trpB MKGRFGRFGGQYVPETVMNALIELEREFEEAKKDEKFMEEYRYYLKEYSGRPTPLYYAENLTKRLGGAKIYLKREDLNHTGAHKINNVLGQVLLAKRMGKKRIIAETGAGQHGVATATAAAMFGMECEIFMGEEDIKRQALNVFRMKLLGAKVTAVTSGTRTLKDAVNEAIRDWVTNIETTFYVIGSVVGPHPYPTMVRDFQRVIGDETKEQILEKEGRLPDYVVACVGGGSNAMGIFYPFIEDKGVKLVGVEAAGEGIETGKHASAMAKGSVGVLHGMMTYLLQDEEGKILPVHSISAGLDYPGVGPEHAYLKEIGRAEYVYATDEEALAAFMDLSRTEGIIPALESAHALAYAMKLAKKLDEDKIIVVNLSGRGDKDVNTVAKVMGVEL Tryptophan synthase beta chain 391 TTE1578 TRPB_THETN The beta subunit is responsible for the synthesis of L- tryptophan from indole and L-serine.